Heat-insulating property detection device and detection method

Abstract

The invention discloses a heat-insulating property detection device and a detection method. The detection device comprises a magnifying lens and a light source, wherein the magnifying lens is used for focusing the light rays generated by the light source. The magnifying lens focuses the light rays generated by the light source, a to-be-detected heat-insulating film is placed before or behind the magnifying lens, and the heat intensity difference is compared between the light rays passing through the heat-insulating film and the light rays not passing through the heat-insulating film, so as to judge the property of the heat-insulating film. The heat-insulating property detection method provided by the invention has the advantages of being visual, scientific, simple and accurate, is capable of effectively prompting the purification of thermal insulation industries, such as a heat-insulating film industry, and prompting the quality of products, and further, the heat-insulating property detection device provided by the invention is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of photothermal performance detection, and in particular relates to a heat insulation performance detection device and a detection method. Background technique [0002] The heat insulation film should block as much heat as possible from sunlight. The heat in sunlight is mainly distributed in visible light and near-infrared rays. Among them, the wavelength range of visible light is 380nm-780nm, and the wavelength range of near-infrared rays is 780nm-2500nm. . Visible light can be seen by human eyes, so it is easy to judge the blocking situation, but because infrared rays are not seen by human eyes, it is difficult to judge the real blocking situation. At the same time, the intensity of sunlight per unit area is small, and the remaining The difference in heat is not easily noticeable. [0003] At present, the instruments for judging the heat insulation performance of heat insulation films on the market mainl...

AI Technical Summary

Problems solved by technology

Among them, in order to test the heat insulation film produced by this type of instrument better (that is, the near-infrared rejection rate of the heat insulation film is high), the heat insulation film manufacturer adds an infrared absorber to the glue layer of the heat insulation film. The infrared absorber only absorbs the infrared rays in the band that this type of testing equipment responds to, for example, it only absorbs infrared rays in the wavelength range of about 1400nm. The thermal insulation performance is good when tested by power meters and similar instruments, but the actual thermal insulation performance is poor

As a result, there are a large number of thermal insulation films that do not block infrared rays or only block infrared rays in a small band on the market, and it is difficult to identify them.

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